The below URL states Call Preservation is on by default on SIP Trunks in CallManager.
However in testing SIP SRST I found my call to PSTN dropped when CallManager went down. Maybe I’m missing some commands, but I can’t find a Cisco.com document about SIP Call Preservation with SRST/CallManager IOS 15.
Is the call through the SIP trunk using the MTP resource on the callmanager that went down ? Basically once the media is set up it will be streamed directly between the endpoints , but if an MTP is incolved it goes through that MTP and if it is on the same CUCM then your call will drop.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
Over the last few months, I have had the privilege of working on SI...
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...